Vault-light.



,1. B. RICKETTS.

VAULT LIGHT.

IIIPLIcIITIoN FILED IAN. I6. I9I5.

1,172,905.' Patented Feb. 22,1916. I

A TTORNEY.

FFIQE.

JOHN IB. RICKETTS, OF KANSAS CITY, MISSOURI.

vAULT-LIGHT.

Application filed January 16, 1915.

To all whom t may concern:

Be it known that I, JOHN B. RIoKE'r'rs, a citizen of the United States,residing at Kansas City, in the county of Jackson and State of Missouri,have invented certain new and useful Improvements in Vault-Lights, ofwhich the following is a specification.

My invention relates to improvements in vault or sidewalk lights, andone object of the invention is to provide the margins and lap joints ofthe metal frame with antileak joints, capable of normal contraction andexpansion without detriment t0 the leak-proof qualities of said joints.

A further object is to provide a metal frame which may be manufacturedat small cost and will not wear smooth from long service.

Other objects of the invention will hereinafter appear, and in orderthat said invention may be fully understood, reference will now be madeto the accompanying drawing, in which:

Figure l is a broken plan view of the invention. Fig. 2 is a brokenisometric view showing a lap joint employed in carrying out theinvention. Fig. 3 is a broken longitudinal sectional view of theinvention. Fig. 4L shows a modified form of joint.

In carrying out the invention, I employ a metal frame l, consisting,preferably, of inexpensive material, such as malleable iron which willnot wear smooth from long use.

Said frame has intersecting transverse and longitudinal ribs 2, formingopenings for the reception of the usual lenses 3, which rest uponshoulders 2a, of the ribs 2, where they are held by a suitable elasticcement 4, which allows for the difference in expansion and contractionbetween the metal frame l and the lenses 3.

The borders of the frame l are provided with slots 5, so that when saidframe is laid upon the usual cement bed 6, and the slots 5 are filledwith cement, said frame l becomes firmly anchored to its bed on thecement becoming set.

That partof the cement in the slots 5, is reinforced by short twistedrods 7 extending down into the bed 6.

In order to prevent moisture or water leaking through the joint betweenthe'frame Copies of this patent may be obtained for ve cents each, byaddressing the Washington, D. C.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Serial No. 2,575.

l and the cement bed 6, the borders of said frame 1 are provided attheir undersides with corrugations or serrations 8, into which thecement becomes embedded and acts as a series of dams in excluding thewater or `moisture from said joint.

The lap joint between two panels of the frame l, is provided withserrations 9 and grooves l0, and a strip of sheet lead or other suitablepacking ll, is inserted between said joint. The serrations 9 becomeembedded in the packing Il and constitute a series of dams thateifectually prevent leakage at said joint.

The usual T-bar l2 is placed beneath the lap joint to support the same.

In the modified form disclosed by Fig. 4, the lap joint is dispensedwith between the panels of the frame la, and the adjacent margins ofsaid panels are spaced apart to admit a rib 12a of a supporting bar 12b,which has a pair of oppositely-disposed anges 12C, to support themargins of the panels. The underside of the margins have serrations 9,which are embedded in packing strips lla, placed upon the flanges 12.

Bolts 13 secure the panels upon the flanges 12, and the countersunkheads of said bolts are protected from water by lead or other suitablemetal lll, whereby the cavities above said heads are closed.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is:

In combination with a pair of spaced adjoining panels having theirbottoms provided with serrations in proximity to their adjacent sides, abar having a vertical rib extending up into the space between thepanels, oppositely disposed flanges on the bar having serrationsreceiving the panel serrations, soft packing strips between theserrations and abutting the rib, and vertical bolts passed through theflanges, packing strips and panels and located on opposite sides of therib.

In testimony whereof I affix my signature, in the presence of twwitnesses.

JOHN B. RICKETTS.

Witnesses:

F. G. FISCHER, L. J. FISCHER.

Commissioner of Patents,

